From: Shaohui Xie <shaohui....@freescale.com>
A U-boot CMD vdd_read is implemented to read Core voltage.
Signed-off-by: Shaohui Xie <shaohui....@freescale.com>
---
board/freescale/t4qds/t4240qds.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/board/freescale/t4qds/t4240qds.c b/board/freescale/t4qds/t4240qds.c
index 4f2cccd..56273e4 100644
--- a/board/freescale/t4qds/t4240qds.c
+++ b/board/freescale/t4qds/t4240qds.c
@@ -887,8 +887,38 @@ static int do_vdd_adjust(cmd_tbl_t *cmdtp,
return 0;
}
+static int do_vdd_read(cmd_tbl_t *cmdtp,
+ int flag, int argc,
+ char * const argv[])
+{
+ int vdd, ret;
+
+ if (argc < 1)
+ return CMD_RET_USAGE;
+
+ ret = select_i2c_ch_pca9547(I2C_MUX_CH_VOL_MONITOR);
+ if (ret) {
+ printf("VID: I2c failed to switch channel\n");
+ return 0;
+ }
+
+ vdd = read_voltage();
+ if (vdd < 0)
+ printf("VID: Could not read voltage\n");
+ else
+ printf("VID: Core voltage is at %d mV\n", vdd);
+
+ return 0;
+}
+
U_BOOT_CMD(
vdd_override, 2, 0, do_vdd_adjust,
"Override VDD",
"- override with the voltage specified in mV, eg. 1050"
);
+
+U_BOOT_CMD(
+ vdd_read, 1, 0, do_vdd_read,
+ "read VDD",
+ " - Read the voltage specified in mV"
+)
--
2.1.0.27.g96db324
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